Fe-V合金碳化物析出型渗碳(CDC)组织  

Fe-V Alloy Microstructure of Carbide Dispersion Carburization

作　　者：王殿梁[1] 刘杨[1] 郝士明[1] 李洪晓[1] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004

出　　处：《东北大学学报（自然科学版）》2003年第2期147-150,共4页Journal of Northeastern University(Natural Science)

基　　金：辽宁省科学技术基金资助项目 ( 9810 30 0 30 1)

摘　　要：通过金相显微镜、扫描电子显微镜及X射线分析研究了Fe V合金CDC处理后表层的相组成、渗层组织和碳的扩散行为·结果表明所有Fe V合金渗层组织由表及里依次为γ +V4 C3 ,α +V4 C3 及α ,最表层碳化物的尺寸为 2 5 0nm ,随渗层的深入碳化物颗粒有所粗化 ,在α相区碳化物的尺寸达 2 5 μm ;CDC处理得到的奥氏体区的厚度与渗碳时间的平方根成正比 ,碳的扩散速度随合金质量分数的增加而降低·The phase of Fe-V alloy means of OM and SEM was investigated. The result show that γ+V 4C 3,α+V 4C 3 and α are dispersion distributing. The outmost CDC layer dimention is 250*!nm deep and carburize dimension become coarsening. Carburizing dimension reached 2.5*!μm in the α phase. The main reason is supposed that the carburized grown different rate in the γ and α phase. Austenitic thickness treated by CDC is proportional to square root of cementite time. The hardness of Fe-V alloy increased evidently after CDC, and the hardened layer become thin with the increasing content of V.

关 键 词：碳化物析出型渗碳 碳势 扩散 Fe-V合金 铁钒合金 渗碳层 

分 类 号：TG156.81[金属学及工艺—热处理]